Radio receiver construction



F. w. mss-mmm ETAL RADIO RECEEVER CONSTRUCTION Nov:J E94@ 2 Sheets-Sheet l Filed Dec. l?, 3.947

Fvederick D. SQP/W1 @n Thai?" Attorney.

N0 89 1949 F. n. scHNomz ET AL RADIQ RECEIVER CONSTRUCTON 2 Sheets-Sheet 2 Filed Dec. 17, 1947 11m/ew Their ,Att-,ovm ey:

Tadevck I). Schn C301 Carro?? MJL @Il /N Patented Nov. 8, 1949 RADIO RECEIVER CONSTRUCTION Frederick D. Schnoor, Stratford, and Carroll N. Hardy, Bridgeport, Conn., assignors to General Electric Company, a corporation of New York Application Decemberv 17, 1947, Serial No. 792,172

2 Claims. (Cl. Z50-14) Our invention relates to portable radio receivers, and more particularly to such receivers of the type adapted to be operated alternatively from a self-contained unidirectional power source or from an external alternating or unidirectional power source. It is a primary object of our invention to provide an improved construction for such receivers.

It is advantageous, in certain commercial applications, to provide portable radio receivers of the personal or miniature type. Such receivers require a small and compact construction in order to obtain the full commercial benefits. In addition, it is desirable to employ a construction which facilitates the replacement or repair of component parts. To this end, it is a particular object of our invention to provide a compact construction for a miniature portable receiver wherein the chassis may be readily removed from the cabinet.

In accordance with our invention, a runnerand-channel arrangement is provided for assembling the chassis to the cabinet. Included on both runners and channels are flared portions forming anti-rattling spring members or nubbins which provide frictional but slidable engagement between cabinet and chassis. By these means, a compact construction is provided, and removal of the chassis from the cabinet is facilitated.

The features of our invention which we believe to be novel are set forth with particularity in the appended claims. Our invention itself, however, together with further objects and advantages thereof, may best be understood by reference to 5 the following description taken in connection with the accompanying drawings, in which:

Fig. 1 is a perspective view of a miniature portable radio receiver which suitably embodies our invention,

Fig. 2 is a perspective View of the chassis portion of the receiver,

Fig. 3 is a fragmentary detailed View in perspective of the runner-and-channel arrangement embodied as a feature of our invention,

Fig. 4 is a bottom View of the cabinet and chassis assembly,

Fig. 5 is a front view of the receiver of Fig. 1,

Fig` 6 is a view taken along section 6-6 of Fig. 5, and

Fig. 7 is a view taken along section I-'I of Fig. 5.

In the drawings, like reference numerals signitive view of a portable radio receiver of the personal type which is constructed according to our invention. There is provided a cabinet I which may be constructed of sheet metal or other suitable sturdy ornamental material. A dimple or recess 2 is provided about the outer surface of cabinet I, in which an adjustable handle 3 is mounted by means of a pair of rails 4 provided in recess 2 on each side of cabinet I. The handle 3 is provided with longitudinal slots 5 which respectively engage rails II. In this manner handle 3 may be raised to the position shown for carrying purposes, or it may be lowered against the cabinet when the receiver is not being carried.

A chassis member 6 is provided for compactly mounting the component parts. Associated with chassis 6 is an eschutcheon 1 which comprises a baille 8 for the loudspeaker, (not shown) and on which are mounted the customary receiver controls 9 and I0. A switch I I is provided for determining whether the receiver is to be operated from enclosed batteries I2 or from an external alternating or unidirectional power source. Hinged to the chassis 6 is a door I3 which contains the receiver antenna, not shown. A power switch I4 of the spring-actuated type is provided; switch I4 is closed by opening door I3 and is opened by closing door i3.

In order to provide a compact assembly oi chassis 6 and cabinet I, a runner-and-channel arrangement is employed. Cabinet I is provided with a pair of longitudinal rectangular channels I5 and I6 along which are disposed a number of anti-rattling spring members I'I. These spring members may be formed by inwardly flaring portions of the channel wall, or by any other suitable means. Chassis is provided with a pair of L-shaped runners I 8 and I9 adapted to engage channels I5 and I6 of cabinet I. Runners I8 and I9 are also provided with anti-rattling spring members or nubbins 20 similar to those employed in the channels I5 and IB. When the chassis 6 is inserted in the cabinet I, runners I8 and I9 engage channels I5 and I6 in a frictional but slidable manner,-so that a compact, tight assembly is provided.

In order that the removal of the chassis 6 from the cabinet I may be further facilitated, the cabinet is provided with a plurality of slots 2l, and the chassis B is provided with a plurality of correspondingly located mounting screws 22. In this manner, mounting screws 22 need never be removed, but only loosened, in disassembling the chassis from the cabinet.

As an added feature, it is desirable that the external alternating or unidirectional power cir-- cuits be automatically opened when the chassis is disassembled from the cabinet. This is accomplished by means of a plug-and-jack arrangement introduced in series with the power line. The jack or receptacle 23 is mounted inside cabinet I, and. respective terminals are connected to the conductors of the power cord 24. The plug 25 is mounted on the chassis 6 in such a position that` it engages receptacle 23 only when the receiver is fully assembled. By these means, it is insured that the chassis may not be withdrawn from the cabinet without disconnecting the receiver from the alternating power source.

Referring to Fig. 2, there isshown a perspective View, from the rear, of the blank chassisv 6, in order to show further the constructional features. It will be seen that provision is made for mounting only four electron tubes; the customary rectifier tube isreplaced by a dry-plate selenium rectifier in order to conserve space.

Fig. 3v is. ay fragmentary detailed view of the runner-and-channelarrangement mentioned in connection with Fig.I 1. The rectangular channel |15 may be constructedl by welding or otherwise` fastening an angle, portion 2B which comprises nubbins I1 to the inner wall of the cabinet. It willY be seen that nubbins I1 on channel I5 press outwardly on. the runner I8, and the nubbins 20 on thev runner similarly press outwardly upon the inner wall of the channel I5. In this manner a sl-idable engagement of runners and channels is provided, and at the same time, rattling or loose't is. precluded.

Referring to. Fig. 4 a bottom view of the receiver oi Eig. 1 isA shown revealing a compartment 21 in which, the batteries. |12 are stored and in which the power cordl 2.4. may be coiled when not in use.

Fig- 5 is a,front.view of the assembled receiver of.. Fig. 1 partially cut away to show the engagementof channels I 5. and II and' runners I8 and I9, as described in detaill in connection with Fig. 3, Also shown. a. portion of the receiver loop antenna 28. which is mounted within door I3.

Figs, 6. and. 7' are sectional views taken respectively at 6'-6` andi T-T in Fig. 5, and are includedV to, show further the action of nubbins I1 and 28 in providing frictional but slidable engagement between. the cabinet channels I5 and I6 and the chassis runners I8' and I9, as heretofore` explained in connection with Fig. 3.

While we havev shown and' described a particular embodiment of our invention, it will be understood' that various modiiications may be made.` For. example, nubbins I1 and 20 have been shown as flared portion-s of the walls of the channels I5.r and I6 andthe runners I8 and I9. However, the anti-rattling action may be provided in numerous other ways, such as by using separate spring membersk in place of the nubbins. We contemplate, in theappended claims, to cover all' such modifications as fall within the true spirit and scopel of" our invention.

What we claimas4 new and' desire to secure by Letters Patent of the United States is:

l. A portable radio receiver of the type adapted to be operated alternatively fromv a self-containing unidirectional power source or from an eX- ternalk alternating current source comprising a metallic enclosingI housing having contiguous rectangular` openings in two adjacent sides thereof, a pair of integral channels formed respectively along parallel edges of one of said openings, sliders positioned along the open sides of said channels, a chassis comprising an L-shaped metallic member of a size suicient to close said openings, one of the legs of said member being slidable. between said sliders, and said channels, said one leg having upturned outer edges adapted to fit within said channel, said sliders having a plurality of longitudinally spaced resilient portions for causing each of said edges slidably to engage the webv of the channel associated therewith, said housing, having a first electrical contact connected to an alternating current source and insul-ati-nglyI positioned on the inner surface of the wall opposing the other of said sides, said chassis includ-ing another electrical contact adapted to engage said first contact when said member is positioned to close said opening to supply alternating current to said chassis, and a door hingedv to said one leg adjacent one of said upturned edges, said door in its closed po'- sition providing a smooth surface between said channels, and operating controls for said receiver positioned on said one leg.

2. A portable radio receiver of the type adapted to be operated alternatively from a self-contained unidirectional source or from an external alternatingv source comprising a cabinet having a pair of longitudinal channels, a chassis having a pair of rectangularly shaped runners adapted to engage said channels, a plurality of anti'- rattling spring members longitudinally disposed along said channers along the open side thereof to bring said channels and said runners into frictional slidable engagement, a jack fastened to an inner wall of said cabinet having a lead adapted to be connected to an alternating cur-I rent source, a plug fastened to said chassis, said plug being adapted to engage said jack to connect` said lead to said chassis when said runners are moved along said channels to the inner extremity thereof, a normally closed power switch mounted upon saidI chassis, a door hinged to saidf chassis, said door in its closed position being arranged to open said power switch, a unidirection.- al power source mounted uponsaid chassis, said chassis including switching means for selectively connecting tosaid unidirectional source or to.v

said lead, said chassis including an additional compartment adapted to receive said lead when said receiver is tobe operated from said uni-v directional source.

FREDERICK D. SCHNOOR. CARROLL N'. HARDY.

REFERENCES CITED The following references are of record in the le of this spa-tent:

UNITED STATES PATENTS France Mar. 24, 1928. 

